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| author | Magnus Damm <damm@opensource.se> | 2011-12-14 01:00:37 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2012-01-09 09:33:50 +0900 |
| commit | 92554d97c6dcc448afd56f96bbe933998868be74 (patch) | |
| tree | 29c6d6ab1c4150b82b52655807d8a3cc9585a826 /drivers | |
| parent | b0e10211cba1629e2e534ca9cb3d87cfc7e389ea (diff) | |
| download | linux-stable-92554d97c6dcc448afd56f96bbe933998868be74.tar.gz linux-stable-92554d97c6dcc448afd56f96bbe933998868be74.tar.bz2 linux-stable-92554d97c6dcc448afd56f96bbe933998868be74.zip | |
sh: pfc: Add gpio_read_bit() for data register access
Introduce gpio_read_bit() for data register read access
and modify sh_gpio_get_value() to make use of the new
function instead of gpio_read_reg(). The purpose of
this change is to update the code to only use the
gpio_read_reg() function for config register access.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/sh/pfc.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/drivers/sh/pfc.c b/drivers/sh/pfc.c index e7d127a9c1c5..cfca0aaf9820 100644 --- a/drivers/sh/pfc.c +++ b/drivers/sh/pfc.c @@ -135,6 +135,19 @@ static void gpio_write_raw_reg(void __iomem *mapped_reg, BUG(); } +static int gpio_read_bit(struct pinmux_data_reg *dr, + unsigned long in_pos) +{ + unsigned long pos; + + pos = dr->reg_width - (in_pos + 1); + + pr_debug("read_bit: addr = %lx, pos = %ld, " + "r_width = %ld\n", dr->reg, pos, dr->reg_width); + + return (gpio_read_raw_reg(dr->mapped_reg, dr->reg_width) >> pos) & 1; +} + static void gpio_write_bit(struct pinmux_data_reg *dr, unsigned long in_pos, unsigned long value) { @@ -644,7 +657,7 @@ static int sh_gpio_get_value(struct pinmux_info *gpioc, unsigned gpio) if (!gpioc || get_data_reg(gpioc, gpio, &dr, &bit) != 0) return -EINVAL; - return gpio_read_reg(dr->mapped_reg, dr->reg_width, 1, bit, dr->reg); + return gpio_read_bit(dr, bit); } static int sh_gpio_get(struct gpio_chip *chip, unsigned offset) |